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3 Digit Addition and Subtraction
Welcome to our 3 Digit Addition and Subtraction page.
Here you will find our selection of Second Grade Addition and Subtraction Worksheets, which will help your child learn to add and subtract numbers with up to 3 digits.
All the worksheets on this page involve using both addition and subtraction problems.
Quicklinks to...
How to do 3 Digit Addition
How to do 3-Digit Addition
Step 1) Add the Ones digit of both numbers together.
- Write the number of Ones below the line in the Ones place.
- If the total of the two digits is 10 or more, then regroup the 10 Ones into 1 Ten and move it into the Tens column.
We add the Ones: 5 + 8 = 13 Ones.
We regroup the 13 Ones into 1 Ten and 3 Ones.
We carry over 1 Ten and move it to the top of the Tens column.
We write a 3 under the line in the Ones place.
Step 2) Add the Tens digit of both numbers together, remember to add any Tens that were carried over.
- Write the number of Tens below the line in the Tens place.
- If the total of the two digits is 10 or more, then regroup the 10 Tens into 1 Hundred and move it into the Hundreds column.
We add the Tens, including the Ten we carried over: 1 + 2 + 1 = 4 Tens.
We write this number under the line in the Tens place.
Step 3) Add the Hundreds digit of both numbers together, remember to add any Hundreds that were carried over.
- Write the number of Hundreds below the line in the Hundreds place.
- If the total of the two digits is 10 or more, then regroup the 10 Hundreds into 1 Thousand and write it into the Thousands place.
We add the Hundreds: 6 + 4 = 10 Hundreds.
We regroup the 10 Hundreds into 1 Thousand and 0 Hundreds.
As there are no further digits to add up, we write the 1 in the Thousands place and a 0 in the Hundreds place.
How to do 3 Digit Subtraction
How to do 3-Digit Subtraction
Step 1) Subtract the Ones digit of the subtrahend (bottom row) from the Ones digit of the minuend (top row).
- Write the number of Ones below the line in the Ones place.
- If the Ones digit on the top row is less than the Ones digit on the bottom row then take a Ten from the number on the top row and convert it into 10 Ones.
- If there are no Tens in the minuend, then take one Hundred from the minuend and convert it into 10 Tens. Then take one of the Tens and convert it into 10 Ones.
We exchange one Ten into 10 Ones. There is now 1 Ten and 13 Ones.
Now we can subtract the Ones: 13 − 6 = 7
Step 2) Subtract the Tens digit of the subtrahend (bottom row) from the Tens digit of the minuend (top row).
- If the Tens digit in the top row is less than the Tens digit in the bottom row then take a Hundred from the minuend (top row) and convert it into 10 Tens.
- Subtract the Tens and write the number of Tens below the line in the Tens place.
We exchange one Hundred into 10 Tens. There are now 7 Hundreds and 11 Tens.
Now we can subtract the Tens: 11 − 9 = 2
Step 3) Subtract the Hundreds digit of the subtrahend from the Hundreds digit of the minuend.
- Write the number of Hundreds below the line in the Hundreds place.
Subtracting the Hundreds gives us: 7 − 4 = 3
This gives us a final answer of 823 - 496 = 327
3 Digit Addition and Subtraction Worksheets
This page contains a range of different worksheets to help you to practice your 3-digit addition and subtraction skills together.
We also have some dedicated webpages to help you to understand and master 3-digit addition and 3-digit subtraction separately.
There a range of worksheets suitable for different levels of ability, including both with and without regrouping.
The aim of these worksheets is to enable you to practice both column addition and subtraction problems on the same sheet.
Using our resources will help your child to:
- practice 3-digit addition and 3-digit subtraction;
- set out a 3-digit addition and subtraction problem correctly.
3 Digit Addition & Subtraction Worksheets
Quicklinks to ...
We have split the sheets into 3 sections.
- The first section is the easiest and involves 3-digit addition and subtraction with no regrouping
- The second section involves 3-digit addition and subtraction with regrouping.
- The final section is for more confident students and involves 3-digit addition and subtraction challenges.
3 Digit Addition and Subtraction With No Regrouping
The sheets in this section are all of a similar level of difficulty.
They involve solving 3-digit addition and subtraction problems with no regrouping needed.
3 Digit Addition and Subtraction With Regrouping
Apart from the first sheet, the sheets are all at a similar level of difficulty.
The first sheet is slightly easier and involves regrouping a maximum of once only.
Sheet 5 & 6 involve writing out the addition and subtraction problems in columns and then solving them.
3-Digit Addition and Subtraction Challenges
The frist two sheets involve filling in the missing digits in the 3-digit additions and subtraction, where the digits may belong to any of the three numbers in the problem.
The third sheet involves using 3-digit addition and subtraction to find the smallest and largest totals that can be made, and is more of an exploratory activity.
Looking for some easier worksheets
As well as 3-digit addition and subtraction worksheets, we also have 2-digit addition and subtraction worksheets.
The sheets are similar to those on this page, but with smaller numbers.
Looking for some harder worksheets
We also have a selection of 4-digit addition and subtraction worksheets and worksheets involving adding much larger numbers.
More Recommended Math Worksheets
Take a look at some more of our worksheets similar to these.
3 Digit Addition Worksheets
This page is dedicated to understanding and learning the 3-digit addition method with step-by-step instructions and lots of worked examples.
There are also lots of different worksheets to help you practice this skill.
3 Digit Subtraction Worksheets
This page is dedicated to understanding and learning the 3-digit subtraction method with step-by-step instructions and lots of worked examples.
There are also lots of different worksheets to help you practice this skill.
Column Addition and Subtraction Worksheet Generator
If you need some more 3 digit addition and subtraction worksheets, then take a look at our addition and subtraction worksheet generator.
You can select the size of numbers and number of questions you want, then create your worksheet in a matter of seconds.
More Second Grade Addition & Subtraction Worksheets
Here are links to some more of our 2nd grade addition and subtraction worksheets to help you apply your skills.
Math Addition & Subtraction Games
Here you will find a range of Free Printable Addition Games to help kids learn their addition facts.
Using these games will help your child to learn their addition facts, and also to develop their memory and strategic thinking skills.
Second Grade Math Word Problems
Here are a range of problems solving sheets for 2nd graders. Most of the sheets contain 'real-life' problems related to animal facts.
Using the sheets will help your child to:
- apply their addition, subtraction, and multiplication skills;
- apply their knowledge of rounding and place value;
- solve a range of 'real life' problems.
All the 2nd grade sheets in this section support Elementary math benchmarks.
These sheets involve solving one or two more challenging longer problems. This link opens in a new tab.
These sheets involve solving many 'real-life' problems involving data.
These sheets involve solving a range of multiplciation problems.
How to Print or Save these sheets 🖶
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How to Print or Save these sheets 🖶
Need help with printing or saving?
Follow these 3 steps to get your worksheets printed perfectly!
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The Math Salamanders hope you enjoy using these free printable Math worksheets and all our other Math games and resources.
If you have any questions or need any information about our site, please get in touch with us using the 'Contact Us' tab at the top and bottom of every page.
